TEST DIRECTORY | MIDx Labs

HIV Ag/Ab COMBO SCREEN (HIV)

Fourth-generation combination assay that detects both HIV antibodies and p24 antigen, enabling earlier detection of acute HIV infection than antibody-only testing.

LIS TEST CODE: HIV

CPT CODE: 87389

ALIASES: HIV, Acquired Immune Deficiency Syndrome (AIDS), Anti-HIV-1/-2, HIV-1/-2 Ag/Ab, HIV combo, Human Immunodeficiency Virus (HIV)

METHODOLOGY: Chemiluminescent Microparticle Immunoassay (CMIA)

SPECIMEN:

- Type: Serum

- Container: Gold Top (SST) Vacutainer

- Minimum Volume Required: 2 mL

- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen at room temperature or in the refrigerator until testing can be performed.

- Stability: Room Temperature (20-25 °C): 3 days

Refrigerated (2-8 °C): 7 days

Frozen (-20 °C or colder): Not Accepted

- Turnaround Time: 24 - 48 hours from receipt.

Special Instructions: Specimens that are initially reactive will be reflexed to a confirmatory assay to differentiate between HIV-1 and HIV-2 antibodies.

REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

REFERENCE RANGES:

Males & Females

>= 1 years of age: Nonreactive